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// Copyright (c) 2020 Vasyl Teliman
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SOURCE_FUZZ_TRANSFORMATION_REPLACE_PARAMETER_WITH_GLOBAL_H_
#define SOURCE_FUZZ_TRANSFORMATION_REPLACE_PARAMETER_WITH_GLOBAL_H_
#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
#include "source/fuzz/transformation.h"
#include "source/fuzz/transformation_context.h"
#include "source/opt/ir_context.h"
namespace spvtools {
namespace fuzz {
class TransformationReplaceParameterWithGlobal : public Transformation {
public:
explicit TransformationReplaceParameterWithGlobal(
const protobufs::TransformationReplaceParameterWithGlobal& message);
TransformationReplaceParameterWithGlobal(uint32_t function_type_fresh_id,
uint32_t parameter_id,
uint32_t global_variable_fresh_id);
// - |function_type_fresh_id| is a fresh id.
// - |parameter_id| is the result id of the parameter to replace.
// - |global_variable_fresh_id| is a fresh id.
// - |function_type_fresh_id| is not equal to |global_variable_fresh_id|.
// - the function that contains |parameter_id| may not be an entry-point
// function.
bool IsApplicable(
opt::IRContext* ir_context,
const TransformationContext& transformation_context) const override;
// - Removes parameter with result id |parameter_id| from its function
// - Adds a global variable to store the value for the parameter
// - Add an OpStore instruction before each function call to
// store parameter's value into the variable
// - Adds OpLoad at the beginning of the function to load the
// value from the variable into the old parameter's id
void Apply(opt::IRContext* ir_context,
TransformationContext* transformation_context) const override;
std::unordered_set<uint32_t> GetFreshIds() const override;
protobufs::Transformation ToMessage() const override;
// Returns true if the type of the parameter is supported by this
// transformation.
static bool IsParameterTypeSupported(opt::IRContext* ir_context,
uint32_t param_type_id);
private:
protobufs::TransformationReplaceParameterWithGlobal message_;
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_TRANSFORMATION_REPLACE_PARAMETER_WITH_GLOBAL_H_
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